(19)

(11)

EP 3 788 521 A1

(12)

(43) Date of publication: 10.03.2021 Bulletin 2021/10 (21) Application number: 19730593.1 (22) Date of filing: 26.04.2019

(51) International Patent Classification (IPC):  G06F 21/31(2013.01) G06F 21/36(2013.01) G06F 21/84(2013.01) H04L 29/06(2006.01) G06F 3/01(2006.01) G06F 21/62(2013.01) H04L 9/32(2006.01) H04W 12/06(2021.01) (86) International application number: PCT/US2019/029246 (87) International publication number: WO 2019/212872 (07.11.2019 Gazette 2019/45)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 04.05.2018 US 201815971663 (71) Applicant: Microsoft Technology Licensing LLC Redmond, Washington 98052 (US)

(72) Inventors: SRINIVASAN, Vidya Redmond, Washington 98052-6399 (US) HOWE, Andrew John Redmond, Washington 98052-6399 (US) MARTINEZ MOLINA, Harold Anthony Redmond, Washington 98052-6399 (US) LAM, Justin Chung-Ting Redmond, Washington 98052-6399 (US) AVERETT, Edward Boyle Redmond, Washington 98052-6399 (US) (74) Representative: Grünecker Patent- und Rechtsanwälte PartG mbB  Leopoldstraße 4 80802 München 80802 München (DE)